Bobbin chute for looms



June 2 2, 194s. R, G, TURNER 2,443,876

BoBBIN CHUTE FORv Looms Filed 001'.. l2, 1946 FIGZ 5 INVENTOR NICI-[AWD6. TURNER ATTORNEY Patented June 22, 1948 BOBBIN CHUTE FOR LOOMS Richard(Si.` Turner, Worcester, Mass., assignor to Crompton & Knowles LoomWorks, Worcester, Mass., a corporation of Massachusetts ApplicationOctober 12, 1946, Serial No. 703,073

along a bobbin chute toward a bobbin receiver or can. It is important toprevent damage to the tip of the bobbin, since the weft unwinds over itduring the weaving operation. The butt of the bobbin is much strongerthan the tip and has no contact with the weft. As bobbin chutes havebeen constructed heretofore however they have directed the expelledbobbins forwardly in such a manner that the tip could strike the frontwall of the bobbin can before the butt end and be damaged.

It is an important object of my present invention to provide a bobbinchute having a forwardly concavesurface for the bobbin butt and anothersurface for the bobbin tip, and wherein the surfaces -are so relatedthat at the instant the bobbin leaves the `bobbin chute its butt ismoving in a direction having a forward component greater than theforward component of the tip.

It is another object of the invention to provide a bobbin chute having aconcave surface on a butt deflector and to which is secured a bobbin tipguide having a straight tip engaging surface which at its upper andlower ends coincides with the concave surface but` is forward of theconcave surface intermediate its ends.

With these and other objects in view which will appear as thedescription proceeds, my invention resides in the combination andarrangement of parts hereinafter described and set forth.

In the accompanying drawings, wherein a convenient embodiment of myinvention is set forth,

Eig. 1.is a side elevation of a forward part of the loom having myimproved bobbin chute applied thereto,

Fig. 2 is an enlarged view looking in the direction of diagonal arrow 2,Fig. 1,

Fig. 3 is a vertical section on line 3-3 of Fig. 2, and Fig. 4 is a viewlooking in the direction of arrow4, Fig. 1.

rReferring particularly to Fig. 1, the loom frame I supports a reservebobbin magazine part of which is indicated at M. Reserve bobbins aretransferred one at a time from the magazine into a shuttle S when thelatter is in the shuttle s claims. (c1. 139-255) box II carried by thelay I2 of the loom. Transferrer arm I3 is part of the magazine andduringreplenishing operation descends to insert a full bobbin indicated at I4into the shuttle and at the same time` expels the depleted bobbin I5from the shuttle. Incident to the transferring operation the depletedbobbin is discharged downwardly and is guided by a chute designatedgenerally at C toward a bobbin receiver or can I6 which may be of anyapproved form. Bobbin chutes may either be carried by the lay or havestationary supports, but in the present instance the bobbin chute C isshown as attached to the l-ay since this is the more usual constructionin weft replenishing looms. The bobbin can I6 will have a front wall I'Iagainst which the bobbins are directed and from which they fall towardthe bottom of the can.

The matter thus far described is of usual Vconstruction except the chuteC as will be pointed out hereinafter.

The chute comprises a rigid plate 20 which may be made of cast iron andsecured to the lay under the shuttle box I I and swing back and forthwith the shuttle box as the lay reciprocates. Secured to plate 2l) is abobbin butt deflector 2| which may be made of sheet metal and beattached to plate 20 as at 22. The deector need not necessarily be madeof sheet metal, but has a surface 23 which is .concave as viewed fromthe front of the loom so that it curves downwardly and forwardly from anupper part thereof to the bottom. The left side of deflector 2l extendsalong a forwardly projecting bobbin butt guiding ange 2li formed as partof chute 20, see Fig. 2.

As shown in Figs. 2 and 3 a bobbin tip guide 25 is secured to thedeflector 2I by screws or the like 26. The reason for this constructionis to permit the delector and guide to be made as a complete unit andthen attached to the plate 20, although the particular means by whichthe bobbin tip guide derives its support from the plate 20 isimmaterial.

The tip guide 25 has a tapered upper end 30 and a similar tapered lowerend 3l, while the intermediate part thereof designated at 32 isrelatively thick so that the surface 33 of the guide which engages thebobbin barrel either at or near its tip will be forward of the concavesurface of the deflector at points intermediate the tapered ends of theguide 25. As shownmore particularly in Fig. 3, the lower end of theguide 25 terminates at the bottom of deector 2|, but this relationshipis a matter of choice, and the guide 25 can if desired project beyondthe bottom of the deflector, but it is not desirable that it terminatevery far above the lower end of the deflector. The upper part of surface33 terminates either at or close to the upper end of the concave surface23 so that the bobbin in its descent will glide onto the surface 33without an abrupt movement of the bobbin tip.

In operation, 'the :expelled bobbin will descend with its `.buttA B andtip T moving down along the upper part of the plate ED. The butt thenengages the concave surface of the deector 2i and moves downwardly alongthe latter in a path behind the surface 33 along which the 'tip end ofthe bobbin moves. As the butt approaches the bottom of the deector thelower end of surface 23 causes the bobbin. butt to be delivered 4'fromthe bottom of the deector in a forward anddownward direction designatedby arrow b, Fig. 3. Simultaneously, that part of the bobbin Aeither ator adjacent to its tip T leaves the bottom of surface 33 moving inthedirection of arrow t, Fig. 3. The arrows` b and t are respectivelytangential to surface 23 and a continuation Aof surface '33.

.Assuming that both butt and tip of the bobbin are moving at the samerate the butt will tend to lead or be in advance of the tip and strikethe front wall il of the can i6 before the tip endl strikes the wall H.The tip thereafter strikes the wall il with a much reduced force and forthis reason is subject to much less damage than has been the case inbobbin chutes as heretofore constructed.

The bobbin chute set forth herein can be used with any typeof bobbinreceiver, such'as the usual galvanized sheet iron can, but it hasparticular advantage when used with `a type `of `multi-conipartmentbobbin receiver set forth in my copend ing application Serial No.703,074 filed 'on even date herewith, now Patent No."2,-28,'251. In thatlapplication the chute is claimed 'combination with "the particular formof bobbin receiver set foiththerein. Since the advantages ofthe bobbinchute are not restricted to use with a cloth or multi-coinpartrnentedbobbin receiver, the bobbin chu-te itself is claimed in this presentapplication. l'

From the fore-going `iirwill be seen that I have provided a simple formof bobbin chute so iconstructedy that at the instant a bobbin fleaves itthe butt is moving in a direction. having a greater forward componentthan that of the bobbin tip, and the lresult of this differencein ratesof movement causes the butt of the bobbin to strik-e the bobbin canfirst and thereby reduce the forcewith which the bobbin tip strikes wallil later. It will be seen that this result is accomplished by providingthe bobbin butt deector with surface 23 which is concave 'as viewed fromthe front of the loom and providing the bobbin tip or barrel guide 25with a surface 33 which extends for the greater part of 'its extent'along a path forward of surface 23. The two surfaces 23 and 33 ineffect produce 4a twisting of the vdescending bobbin resulting inforward movement ofthe bobbin -buttrelatively to the tip. rThe surface33 need not necessarily be straight as shown, but Vit is desirable thatits intermediate zparts zbetween 'theends 30 'and 3l be forward of thecorresponding -parits of the surface It also desirable that the Ilowerend 3l of the guide 25 vterminate approximately at the vbottofrnof theconcave surface 23 so that the bobbin butt and tip 'may leave the chute:at approximately the saine time and at the instant when they are moving.forwardly alt different rates.

Having thus described my invention it will be seen that changes andmodifications may be made therein lby those skilled in the art withoutdeparting from the spirit and scope of the invention and I do not wishto be limited to the details herein disclosed, but what I claim is:

l. In a weft replenishing loom having a shuttle box from which -a bobbinis discharged during a. replenishing operation toward a bobbin receiver,a bobbin chute under the lay having a concave bobbin butt engagingsurface and having a Second surface for engagement with the .bobbinbetween the butt and tip thereof, both of said surfaces lextendingdownwardly and forwardly and the first surface being soy related to thesecond surface as to cause the butt of the bobbin when the latter leavesthe chute to travel forwardly at a rate greater than the rate at whichthe tip of the bobbin moves forwardly.

2. In a weft replcnishng loorn having a shuttle box from which a bobbinis discharged during a replenishing operation toward a bobbin receiver7:a bobbin chute under the shuttle boxhaving two laterally `spacedsurfaces one of which is concave with respect to the front of the loomand positioned to engage the butt of the bobbin and the other of whichis substantially straight and inclined downwardly and forwardly andpositioned to engage part of the bobbin adjacent to the tip end thereof,said two surfaces effective when the bobbin leaves the chute to causethe butt end of the rbobbin to move forwardly at a. rate greater thanthe rate at which the tip end of the bobbin moves forwardly.

3. In a weft replenishing loom having la shuttle box from which a bobbinis discharged during a replenishing operation toward a bobbin receiver,a bobbin chute under the shuttle box having a surface to engage thebobbin butt vand having a econd surface to engage the bobbin between thebutt and tip thereof, said surfaces -being so constructed and related to'each other lthat as a bobbin descends along the chute the butt endthereof moves forwardly i-n a curved path concave from the front of theloom, while 'the tip moves ydownwardiy and forwardly along asubstantially straight path.

4. In a weft replenishing loom having a shuttle bon from which a bobbinis "discharged Lduring a :re-plenishing operation .toward a bobbinreceiver., a bobbin chute under the shuttle box having arde-fe ilectorformed with a bobbin butt engaging surface concave with respect to thefront of the loom, a bobbin barrel engaging guide having a barrelengaging surface which extends downwardly and forwardly, the upper andlower ends of said vsurface :being substantially coincident with saidconcave |su-rface andthe intermediate part of the barrel engagingsurface being forward of that part of the Vconcave surface between thetop and bottom of the guide, said surfaces effective to cause the buttyof the bobbin to -move forwardly at a given rate and the -tip of ythebobbin to move forwardly at a lesser' rate when the bobbin-'leaves thechute.

5. In a weft replenishing loo-m having a shuttle box from which a bobbinis ydischarged during a replenishing operation toward a bobbin receiver,a 'bobbin chute under the shuttley box having two surfaces directeddownwardly and forwardly, one surface being concave Iand for the butt ofthe bobbin and :the other surface being substantially straight and forthe barrel of the bobbin, said surfaces effective to engage theirrespective Aparts of the bobbin as the latter is discharged and descendsalong the chute and causing the butt of the bolobin to move forwardlyrelatively to the tip of the loo-lobin `as the descending bobbinapproaches the bottom of the chute.

6. In a weft replenishing loom having a shuttle box from which a bobbinis discharged during a replenishing operation toward a bobbin receiver,a loobbin chute under .the shuttle box having two surfaces directeddownwardly and forwardly, one surface for the butt `of the bob-bin andthe other surface for the barrel of the bobbin, said surfaces eective toengage their respective rparts of the bobbin as they latter isdischarged and descends yalong the chute and twisting the hobbin in suchmanner as to cause the Iloutt and tip to lmove 15 forwardly at differentrates. the greater of which is that of the butt as the bobbin leaves thechute.

RICHARD G. TURNER.

REFERENCES CITED The following references are of record in the lc ofthis patent:

UNITED STATES PATENTS 10 Number Name Date 885,021 Crompton Apr. 21, 19081,485,911 Ellis Mar. 4, 1924 2,376,738 Turner May 22, 1945 2,379,539Nichols July 3, 1945

